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1Digital revistaSCIELO
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2Digital revistaSCIELO
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3by Xu Chengqi, International Poplar Commission. Working Party on Poplar Diseases eng 22-25 Sep 1992 Sess. 18 Zaragoza (Spain), Wang Taizhen, Hao Hong, Wu Lijun, Wei Jianhua
Published 1992Texto bibliotecaFAO IT